where to buy the "powerjets" for bst38ss carbs in US?

[boilerdude]

Where to buy the special power jet that is blanked off in US and UK please (In US). I wanna experiment with them. I know the factory pro blog says they're mostly only useful with the gsxr 750m with it's stock airbox... HOWEVER when you order from factory pro the bst38ss kit for gsxr 1100 (crb-s21 kit)... It comes with a pamphlet showing some recommended settings from various dyno shops across the US. Some of the setups show slightly smaller main jets like 140 something sizes along with those power jets in use.  

Anyway I might like to try them. If anybody can find me those special little powerjets for sale to US I would appreciate. 

There's 2 or 3 different sizes you can get If I remember correctly. Maybe more. 

Edited July 13, 2017 by boilerdude